Heat exchange roll



Feb. 11, 1964 J. c. NASH HEAT EXCHANGE ROLL 2 Sheets-Sheet 1 Filed July 27, 1961 IN VEN TOR.

JOHN CPANDON NASH A TTORNE Y Feb. 11, 1964 J, g, H 3,120,867

HEAT EXCHANGE ROLL Filed July 27, 1961 v 2 Sheets-Sheet 2 INVEN TOR.

JOHN CPA/VDO/V NASH ATTORNEY United States Patent M 3,129,867 HEAT EXCHANGE RGLL .ichn Crandon Nash, 25 Rhode Island Ave, Providence, RI. Filed July 27, I961, Ser. No. 127,314 4 Claims. (Cl. lei-99) This invention relates to heat exchange rolls and more particularly to heat exchange rolls through which heat transfer fluid is circulated to control the temperature at the surface of the roll.

Numerous attempts have been made in the past to de- Velop heat exchange rolls having passages for the flow of heat transfer to control the surface temperature. In many of the rolls of this type produced heretofore, the roll was of single unit construction with the roll wall too thick to allow the heat transfer fluid to properly control the temperatures at the surface of the roll. In addition to this disadvantage, the rolls heretofore produced had fluid conducting passages which made it impossible to have large quantities of heat transfer fluid flowing therethrough at the same time and at high velocities. In many of the rolls heretofore developed, it was customary to feed fluid into one end of the roll and, after making three passes back and forth across the length of the roll, the fluid was discharged from the opposite end. Where a number of heat control passages are present, it has been customary to have the heat transfer fluid enter the passages from one end of the roll and leave from the opposite end. This system permitted all the fluid which was at the proper temperature to enter one end of the roll. The fluid left the opposite end of the roll at a much lower temperature, thereby, causing a considerable temperature differential to exist across the roll between the point at which the fluid entered the passages and the point at which the fluid left the passages. The prior art rolls therefore, did not provide a uniform temperature longitudinally nor circumferentially.

In addition to the disadvantages enumerated above, many of the conventional rolls were cast about pipes which formed the passages, thus making it impossible to disassemble the roll for purposes of maintenance.

An object of the present invention is to provide a heat exchange roll with a uniform temperature on both the longitudinal and circumferential surface of the roll.

Another object of the present invention is to provide a heat exchange roll with a uniformly heated outer surface free of isolated hot spots and cold spots.

A further object of the present invention is to provide ideal heat transfer conditions in a heat exchange roll which result from the tortious path of the heated fluid through a unique arrangement of passageways or channels in the heat exchange.

And still another object of the present invention is to provide passageways in a heat exchange roll which circulate the fluid flow in adjacent passageways in a counter direction, thereby averaging the circulating temperatures of the fluid throughout the longitudinal and circumferential areas of the roll.

Another object of the present invention is to provide a temperature exchange roll for the reception and circulation of a heated fluid or a cooled fluid, whereby the surface of the roll is either uniformly heated or uniformly cooled.

And still a further object of the present invention is to provide a roll which can be easily disassembled and assembled for purposes of cleaning the fluid passages and repairing the internal parts of the roll.

Other objects of the present invention will become apparent in part and be pointed out in part in the following specification and claims.

3,32%,867 Patented Feb. 11, 1964 Like reference numerals refer to like parts in the following drawings in which:

FIGURE 1 is a cross sectional view taken on line 1-1 of FIGURE 2, showing the internal construction of the new and improved heat exchange roll.

FIGURE 2 is a transverse cross sectional view taken along line 2-2 of FIGURE 1 with the View in the direction of the arrows.

FIGURE 3 is a view similar to view 2-2 but taken on line 3-3 of FIGURE 1.

FIGURE 4 is a view similar to view 2-2 but taken on line 4-4 of FIGURE 1.

FIGURE 5 is a view similar to view 2-2 but taken on line 5-5 of FIGURE 1.

FIGURE 6 is a perspective view of the fluid transfer end of the new and improved heat exchange roll.

FIGURE 7 is a perspective View of the body of the new and improved heat exchange roll.

FIGURE 8 is a perspective view of the inlet and outlet end of the new and improved heat exchange roll.

Reference is now made to the drawings wherein is illustrated a heat exchange roll, generally indicated by reference numeral 11. Heat exchange roll 11 comprises a longitudinal cylinder provided with a plurality of uniformly and circumferentially spaced longitudinal passageways, 12, 13, 14, 15, 16, 17, 13 and 19, illustrated as eight in number. However, heating or cooling requirements could change the number, size or area of the passageways. Four threaded areas 20, 21, 22, 23 are provided in the end of roll 1-1. A longitudinal axial core 25 is provided throughout the length of roll 11.

An inlet and outlet, end, generally indicated by reference numeral 27 is provided with a cylindrical body 28 having a trunnion 29 and a circular projection 30 extending or projecting from opposite sides thereof. Inlet, outlet end 27 is provided with an axial opening 31 bell mouthed at 32 and threaded at 33. Cylindrical body 28 is provided with return ports 34, 35, 36, 37. Each re turn port is of an area to engage two of said. longitudinal passageways I2, 13, etc., so that, by way of example fluid from longitudinal passageway 12 will flow into return port 34 and then to passageway 13 to flow in a direction counter or opposite to the flow in longitudinal passageway 12. Cylindrical body 28 is also provided with bolt orifices as, 41, 42 and 43.

A fluid transfer end, generally indicated by reference character 45 is provided with a cylindrical housing 46 having a trunnion 47 and a round flange 48 extending or projecting from opposite sides thereof.

Flange 4% is provided with an axial bore 50.

Four radial passageways 51, 52, 53, 54- are provided through cylindrical housing 46. Each of said radial passageways are in communication or connected with axial bore 5% The end of each radial passageway 51, 52, 53, 54 is provided, respectively, with a plug 55, 56, 57, 58. Each radial passageway 51, 52, 53, 54 is provided with a horizontal outlet, 60, 61, 62, 63, respectively. Cylindrical housing 4-5 is provided with return passageways 65, 66, 67, 68. As illustrated flange 48 is provided with recesses which are an extension of return passageways 65, 66, 67, 68. Cylindrical housing 46 is provided with four screw clearance orifices 7i [1, 72. The fourth clearance orifice is not visible in FIGURE 6.

Roll 11, inlet and outlet end 2'7 and fluid transfer end 45 are assembled in the following manner.

Flange :8 is inserted in axial core 25 of roll 11, with longitudinal passageway 13 aligned and connected with return passageway as. In the same manner longitudinal passageways 15, 1'7 and 19 are aligned and connected with return passageways 66, 437 and 63, respectively. Return Ll passageways 65, d6, 67 and are also aligned and connected with axial core 25.

Longitudinal passageway 12 is aligned and connected with horizontal outlet st. in the same way, longitudinal passageways 14, M 13 are aligned and connected with horizontal outlets M, 62 and respectively.

Circular projection of inlet and outlet end 27 is inserted in axial core with longitudinal passageway 13 aligned and connected with return port 34. Return port 34 is also aligned and connected with longitudinal passageway 12, so that return port 34% in effect is a connection for the passage of fluid from longitudinal passageway 22 to longitudinal passageway 13. In the same way longitudinal passageways l4, l5 and 16, 17 and 13, 19 are aligned and connected with return ports 35, 36, 37, respectively.

Inlet and outlet end 27 is secured to roll ll in fluid tight relationship by means of machine screws 86 which rotatively engage threaded areas 26, 21, 22, 23. Machine screws ill secure fluid transfer end 4-5 to roll 11 in fluid tight relationship through tapped areas in roll 11 and clearance orifices 7d, '71 etc., in fluid transfer end 45.

A tube 82 is secured in the walls of axial bore 543 as by means of threads 83. A rotary joint 84 (iragmentarily shown) is secured to threads 33.

In operation fluid, heated or cooled to a preselected temperature will ilow in the direction of arrow 1 through the bore of tube 82 into axial bore 56 where the fluid will flow into radial passageways 51, 52, S3, 54 in the direction of arrows C. The fluid will then flow from radial passageways 51, 52, 53, 5 into the connecting companion horizontal outlet 6%, 61, e2, 63, respectively. The fluid will then flow from horizontal outlets 6t), 61, 62, '63 into longitudinal passageways l2, l4, l6, 18, respectively, in the direction of arrow D. The fluid will then flow from longitudinal passageways 12, 1d, 16 and 18 into return ports 34, 36, 37, respectively. Since return ports 34, 35, 36, 37 are also connected to longitudinal passageways 13, l5, l7, 19, respectively, the fluid flowing in longitudinal passageways 12, i l, l6, 18 will be reversed in direction when flowing into longitudinal passageways 13, 15, 1'17, 19, respectively, in the direction of arrow E. The fluid flowing through longitudinal passageways 13, 15, l7, 19 will then flow into return passageways 65, 66, 67, 63, respectively, and from said return passageways, the fluid will flow into axial core 25, in the direction of arrow F, to be returned to the heating or cooling source or reservoir (not shown). The reservoir (not shown) may be the source of either hot oil for heating the surface 1th? of roll 11 or it could be the sou ce of a cooling fluid such as cool water. In either event the surface 1% is provided with a uniform temperature both longitudinally and circumierentially.

It will be noted that roll 11 is provided with an even number of uniformly spaced longitudinal passageways l2, 13, etc, which circulate fluid alternately in opposite directions through roll ll, so that the transverse area of the roll between any two adjacent longitudinal passageways (l2, i3) is subjected to the same mathematical resultant of temperatures.

As illustrated in FEGURE 6, 7, 8 there provided a centrally located longitudinal cylinder or roll 11 having detachable opposite ends 27, 45 which serve the function of reversing the direction of {low of the fluid through roll 11. The end 27, 45 may be separated from roll ii for cleaning or repair.

As clears seen in FIGURE 7, channels or passageways l2, l3, etc, are uniformly located circumferentially in irealized that structural changes could be made and other examples given without departing from either the spirit or scope of this invention.

What I claim is:

l. A heat exchange roll comprising a longitudinal cylinhaving a plurality of circumierentially spaced longi tudinal passageways and a longitudinal axial core, a fluid transfer end comprising a cylindrical housing having a trunnion extending from one side and a round flange extending from the opposite side, an axial bore provided in said round flange and in said cylindrical housing, means for removably securing said fluid transfer end to said longitudinal cylinder with said round flange located in said longitudinal axial core, means in said cylindrical housing for conducting fluid from said axial bore to alternate longitudinal passageways and additional passageway means for conducting fluid from the remaining longitudinal passageways to said axial core, an inlet and outlet end com prising a cylindrical body provided with a trunnion projecting from one side and a circular projection on the opposite side with said circular projection located in said longitudinal axial core, an axial opening in said trunnion cylindrical body and circular projection, constituting a fluid outlet means removably securing said inlet and outlet end to said longitudinal cylinder, means in said cylindrical body for conducting fluid from one longitudinal passageway to the adjacent longitudinal passageway for reversing the direction of flow of the fluid flowing through said longitudinal cylinder and a tube located in said axial opening and axial core, and secured to said round flange to provide an extension of said axial bore for the inlet entrance of fluid to said fluid transfer end.

2. A heat exchange roll comprising a longitudinal cylinder having a plurality of circumierentially spaced longitudinal passageway heat transfer fluid channels disposed throughout the effective working area of the longitudinal cylinder, and an axial core, a fluid transfer end comprising a cylindrical housing havin g a trunnion extending from one side and a round flange ext nding from the opposite side, an axial bore provided in said round flange and in said cylindrical housing, a plurality of radial passageways circumferentially spaced in said cylindrical housing and in communication with said axial bore, each of said plurality of radial passageways having a horizontal outlet, a plurality of return passa eways circumferentially spaced in said cylindrical housing, said round flange extending into said axial core with said plurality of radial passageways through the horizontal outlets aligned and in communication with alternate longitudinal passageways, and with said plurality of return passageways aligned and in communication with the remaining longitudinal passageways and with said axial core, an inlet and outlet end comprising a cylindrical body provided with a trunnion projecting from one side and a circular projection on the opposite side, an axial opening in said trunnion, cylindrical body and circular projection, a plurality of return ports circumferentially spaced in said cylindrical body, said circular projection extending into said axial core with each of said plurality of return ports aligned with two adjacent passageways or" said plurality of longitudinal passageways and a tube located in said axial opening and axial core and secured to said round flange to provide an extension of said axial bore, means to secure said fluid transfer end to one end or" said longitudinal cylinder and means securing said inlet and outlet end to the opposite end of said longitudinal cylinder whereby fluid entering said tube passes to said fluid transfer end Where said plurality of radial passageways direct the fluid into alternate longitudinapassageways for circulation in one direction and said return ports circulate the fluid through the longitudinal passageways located between the alternate longitudinal passageways for circulation in an opposite direction through longitudinal cylinder and to said plurality of return passageways and into said axial core for exit through said axial opening.

3. A heat exchange roll comprising a longitudinal cylinder having a plurality of uniformly and circumferentially spaced longitudinal passageways and an axial core, a fluid transfer end comprising a cylindrical housing having a trunnion extending from one side and a round flange extending from the opposite side, an axial bore provided in said round flange and in said cylindrical housing, a plurality of radial passageways uniformly and circumferentially spaced in said cylindrical housing and in communication with said axial bore, each of said plurality of radial passageways having a horizontal outlet, a plurality of return passageways uniformly and circumferentially spaced in said cylindrical housing, said round flange extending into said axial core with said plurality of radial passageways through the horizontal outlets aligned and in communication with alternate longitudinal passageways, and with said plurality of return passageways aligned and in communication with the remaining longitudinal passageways and with said axial core, an inlet and outlet end comprising a cylindrical body provided with a trunnion projecting from one side and a circular projection on the opposite side, an axial opening in said trunnion, cylindrical body and circular projection, a plurality of return ports uniformly and circumferentially spaced in said cylindrical body, said circular projection extending into said axial core with each of said plurality of return ports aligned with two adjacent passageways of said plurality of longitudinal passageways and a tube located in said axial opening and axial core and secured to said round flange to provide an extension of said axial bore, means to secure said fluid transfer end to one end of said longitudinal cylinder and means securing said inlet and outlet end to the opposite end of said longitudinal cylinder whereby fluid entering said tube passes to said fluid transfer end where said plurality of radial passageways direct the fluid into alternate longitudinal passageways for circulation in one direction and said return ports circulate the fluid through the longitudinal passageways located between the alternate longitudinal passageways for circulation in an opposite direction through said longitudinal cylinder and to said plurality of return passageways and into said axial core for exit through said axial opening.

4. A heat exchange roll comprising a central longitudinal body having eight uniformly and circumferentially spaced longitudinal passageways and an axial core, a fluid transfer end comprising a cylindrical housing having a trunnion extending from one side and a round flange extending from the opposite side, an axial bore provided in said round flange and in said cylindrical housing, four radial passageways uniformly and circumferentially spaced in said cylindrical housing in communication with said axial bore, each of said radial passageways having a horizontal outlet, four return passageways uniformly and circumferentially spaced in said cylindrical housing, said round flange extending into said axial core with said four radial passageways through the horizontal outlets aligned and in communication with four of said longitudinal passageways, and with said four return passageways aligned and in communication with the remaining four of the eight longitudinal passageways and with said axial core, an inlet and outlet end comprising a cylindrical body provided with a trunnion projecting from one side and a circular projection on the opposite side, an axial opening in said trunnion, cylindrical body and circular projection constituting an outlet, four return ports uniformly and circumferentially spaced in said cylindrical body, said circular projection extending into said axial core with each of said four return ports aligned with two each of said eight longitudinal passageways and a tube located in said axial opening and axial core and secured to said round flange to provide an extension of said axial bore and constituting the fluid inlet, means to secure said fluid transfer end to one end of said central longitudinal body and means securing said inlet and outlet end to the other end of said central longitudinal body.

Banbury Dec. 6, 1927 Baby Feb. 28, 1950 

1. A HEAT EXCHANGE ROLL COMPRISING A LONGITUDINAL CYLINDER HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED LONGITUDINAL PASSAGEWAYS AND A LONGITUDINAL AXIAL CORE, A FLUID TRANSFER END COMPRISING A CYLINDRICAL HOUSING HAVING A TRUNNION EXTENDING FROM ONE SIDE AND A ROUND FLANGE EXTENDING FROM THE OPPOSITE SIDE, AN AXIAL BORE PROVIDED IN SAID ROUND FLANGE AND IN SAID CYLINDRICAL HOUSING, MEANS FOR REMOVABLY SECURING SAID FLUID TRANSFER END TO SAID LONGITUDINAL CYLINDER WITH SAID ROUND FLANGE LOCATED IN SAID LONGITUDINAL AXIAL CORE, MEANS IN SAID CYLINDRICAL HOUSING FOR CONDUCTING FLUID FROM SAID AXIAL BORE TO ALTERNATE LONGITUDINAL PASSAGEWAYS AND ADDITIONAL PASSAGEWAY MEANS FOR CONDUCTING FLUID FROM THE REMAINING LONGITUDINAL PASSAGEWAYS TO SAID AXIAL CORE, AN INLET AND OUTLET END COMPRISING A CYLINDRICAL BODY PROVIDED WITH A TRUNNION PROJECTING FROM ONE SIDE AND A CIRCULAR PROJECTION ON THE OPPOSITE SIDE WITH SAID CIRCULAR PROJECTION LOCATED IN SAID LONGITUDINAL AXIAL CORE, AN AXIAL OPENING IN SAID TRUNNION CYLINDRICAL BODY AND CIRCULAR PROJECTION, CONSTITUTING A FLUID OUTLET MEANS REMOVABLY SECURING SAID INLET AND OUTLET END TO SAID LONGITUDINAL CYLINDER, MEANS IN SAID CYLINDRICAL BODY FOR CONDUCTING FLUID FROM ONE LONGITUDINAL PASSAGEWAY TO THE ADJACENT LONGITUDINAL PASSAGEWAY FOR REVERSING THE DIRECTION OF FLOW OF THE FLUID FLOWING THROUGH SAID LONGITUDINAL CYLINDER AND A TUBE LOCATED IN SAID AXIAL OPENING AND AXIAL CORE, AND SECURED TO SAID ROUND FLANGE TO PROVIDE AN EXTENSION OF SAID AXIAL BORE FOR THE INLET ENTRANCE OF FLUID TO SAID FLUID TRANSFER END. 